Remove superfluous comments

Remove a few comments that previously add noise but don't offer a great
deal of value.

Issue gh-8945

samples/boot/oauth2resourceserver/src/integration-test/java/sample/OAuth2ResourceServerApplicationITests.java

@@ -62,8 +62,6 @@ public class OAuth2ResourceServerApplicationITests {
 				.andExpect(content().string(containsString("Hello, subject!")));
 	}
 
-	// -- tests with scopes
-
 	@Test
 	public void performWhenValidBearerTokenThenScopedRequestsAlsoWork()
 			throws Exception {